[tasks/lint_rules] Use flat ESLint for list generation

[leaysgur]

• For now, https://github.com/oxc-project/oxc/tree/main/tasks/lint_rules is using the ESLint Node.js API to track implementation progress
• The latest ESLint, now at v9 (which defaults to flat config), does not support APIs such as Linter#getRules() and defineRule() that we've been using 😢
• Unfortunately, there is no direct Node.js API replacement for these functions
  • Change Request: Linter.getRules() equivalent support in Flat ESLint eslint/eslint#18103
  • We need to fetch https://github.com/eslint/eslint/blob/main/docs/src/_data/rules_meta.json directly
• However, it's still possible to access the legacy APIs by using Linter({ configType: "eslintrc" })
• Major plugins have yet to support flat config and appear to be in a transitional phase

There's no need to rush, but we should address this in the near future, before the release of v10.

See also:

📈 Tracking: Flat Config support · Issue #18093 · eslint/eslint
eslint/eslint#18093

[Boshen]

Action: fetch rule list from https://github.com/eslint/eslint/blob/main/docs/src/_data/rules_meta.json

[Boshen]

According to eslint/eslint#18103, there'll be something else by the next major version. Let's close this as not planned for now and wait until things break since there's no actionable items to do.